<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<style>
	div {
		width: 200px;
		height: 200px;
		border-width: 1px;
		border-color: pink;
		/*border-style: solid;*/
		/*border-style: dashed;*/
		/*border-style: dotted;*/
		border-style: double;
	}
	</style>
</head>
<body>
	<div>我是一个盒子</div>
</body>
</html>